[TIMOB-14754] MobileWeb: Views are aligned to the left inside ScrollViews

problem

When adding a view with no positioning constraints to a ScrollView in Mobileweb, the view is positioned on the left side of the screen instead of in the center as the other platforms are.

expected

The view should be positioned in the middle of the Scrollview when no positioning properties are applied.

test case

Note that simply change createScrollView to createView causes the label to be centered as expected. When the ScrollView is used, it is positioned on the left.

var win = Ti.UI.createWindow({
	backgroundColor: '#fff',
	modal: false,
	exitOnClose: true
});
var container = Ti.UI.createView({
	backgroundColor: '#888'
});
var label = Ti.UI.createLabel({
	text: 'label',
	height: 60,
	width: 150,
	backgroundColor: '#afa'
})

win.add(container);
container.add(label);
win.open();